Ingredients:
1 (18.25 ounce) package white cake mix
3 eggs
1 cup vegetable oil
1 cup lemon-lime flavored carbonated beverage
2 (3 ounce) packages instant pistachio pudding mix
1 cup Cool Whip
1 cup cold milk
Directions:
Combine cake mix, eggs, oil, soda drink and 1 box pistachio pudding. Pour Batter into greased and floured 13 x 9 inch pan.
Bake at 350° F (175° C) for 30 to 40 minutes, or until toothpick inserted into cake comes out clean. Cool completely.
While cake is baking, mix 1 box pistachio pudding, whipped topping, and milk. Chill. Ice cooled cake with chilled frosting.